US9598513B2ActiveUtilityA1

Long chain branched polymers and methods of making same

98
Assignee: CHEVRON PHILLIPS CHEMICAL CO LPPriority: Nov 30, 2011Filed: Apr 1, 2015Granted: Mar 21, 2017
Est. expiryNov 30, 2031(~5.4 yrs left)· nominal 20-yr term from priority
Inventors:Youlu YuEric D. SchwerdtfegerMax P. McdanielAlan L. SolenbergerKathy S. Clear
B01J 37/08C08F 2500/09B01J 21/08B01J 23/26C08F 110/02C08F 210/02C08F 4/18C08F 2500/04C08F 4/78C08F 10/02C08F 4/69C08F 4/025B01J 35/612B01J 35/613B01J 35/615
98
PatentIndex Score
32
Cited by
110
References
20
Claims

Abstract

A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A polyethylene polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms and a polydispersity index (M w /M n ) of greater than about 20, wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. 
     
     
       2. The polymer of  claim 1  wherein the long-chain branching content peaks at greater than about 1.0 long-chain branches per chain. 
     
     
       3. The polymer of  claim 1  wherein the long-chain branching content peaks at about 25 long chain branches per million carbon atoms. 
     
     
       4. The polymer of  claim 1  wherein the long-chain branching content peaks at about 30 long chain branches per million carbon atoms. 
     
     
       5. The polymer of  claim 1  having a melt index of from about 0 dg/min to about 1.00 dg/min. 
     
     
       6. The polymer of  claim 1  having a density of from about 0.90 g/cc to about 0.97 g/cc. 
     
     
       7. The polymer of  claim 1  having a density of from about 0.93 g/cc to about 0.97 g/cc. 
     
     
       8. The polymer of  claim 1  having a melt index of from about 0.1 dg/min to about 10 dg/min. 
     
     
       9. The polymer of  claim 1  having a polydispersity index of greater than about 25. 
     
     
       10. The polymer of  claim 1  wherein the long-chain branching content peaks at greater than about 1.5 long-chain branches per chain. 
     
     
       11. The polymer of  claim 1  wherein the long-chain branching content peaks at greater than about 2.0 long-chain branches per chain. 
     
     
       12. A polyethylene polymer having a polydispersity index of greater than about 25 and a long chain branching content wherein the long-chain branching content peaks at greater than about 1.0 long-chain branches per chain and wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. 
     
     
       13. The polymer of  claim 12  having a density of from about 0.90 Wee to about 0.97 g/cc. 
     
     
       14. The polymer of  claim 12  having a density of from about 0.93 g/cc to about 0.97 g/cc. 
     
     
       15. The polymer of  claim 12  having a melt index of from about 0 dg/min to about 100 dg/min. 
     
     
       16. The polymer of  claim 12  having a melt index of from about 0.1 dg/min to about 10 dg/min. 
     
     
       17. The polymer of  claim 12  wherein the long-chain branching content peaks at about 25 long chain branches per million carbon atoms. 
     
     
       18. The polymer of  claim 12  wherein the long-chain branching content peaks at about 30 long chain branches per million carbon atoms. 
     
     
       19. The polymer of  claim 12  wherein the long-chain branching content peaks at greater than about 1.5 long-chain branches per chain. 
     
     
       20. The polymer of  claim 12  wherein the long-chain branching content peaks at greater than about 2.0 long-chain branches per chain.

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